I use Ubuntu 10.10 on my Asus 1018p. Every few second I heare an clicking noise of my hdd. How can I turn it off?
That is not from Linux, that sound is when the HDD puts the head into parking position. I don't think, you can turn it off, although disable the "Turn off HDD when possible" tick in System -> Preferences -> Power Management -> Running on Battery, it may help by parking the head fewer.